Segregate lint and test cache

As Clippy does not compile dependencies and completes first, they end up never being cached

.gitea/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-cargo-1.73.0
+          key: ${{ runner.os }}-cargo-1.73.0-lint
 
       - uses: actions-rs/toolchain@v1
         with:
@@ -80,7 +80,7 @@ jobs:
             ~/.cargo/registry/cache/
             ~/.cargo/git/db/
             target/
-          key: ${{ runner.os }}-cargo-${{ matrix.rust }}
+          key: ${{ runner.os }}-cargo-${{ matrix.rust }}-test
 
       - name: Install rust (${{ matrix.rust }})
         uses: actions-rs/toolchain@v1